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USB: io_ti: query hardware-buffer status in chars_in_buffer
authorJohan Hovold <jhovold@gmail.com>
Mon, 14 Jan 2013 15:52:57 +0000 (16:52 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Fri, 18 Jan 2013 23:45:17 +0000 (15:45 -0800)
Query hardware-buffer status in chars_in_buffer should the write fifo be
empty.

This is needed to make the tty layer wait for hardware buffers to drain
on close.

Signed-off-by: Johan Hovold <jhovold@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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